(function ($) {
        $.fn.annoy = function (params) {
            var paramsType = typeof(params);
            if (paramsType != 'undefined' && paramsType != 'object') {
                throw new Error('Parameters must be object');
            }

            var defaultParams = {
                limit: 0,
                indent: 0,
                wrap: true
            };

            for (var key in params) {
                switch (key) {
                    case 'limit':
                        var limit = params[key];

                        if (limit instanceof jQuery) {
                            defaultParams[key] = limit;
                        }
                        else {
                            defaultParams[key] = $(limit);
                        }
                        break;
                    case 'indent':
                        if (!isNaN(params[key])) {
                            defaultParams[key] = params[key];
                        }
                        break;
                    case 'wrap':
                        if (typeof(params[key]) == 'boolean') {
                            defaultParams[key] = params[key];
                        }
                        break;
                }
            }

            this.each(function () {
                var $this = $(this);

                if (defaultParams.wrap === true) {
                    $this.wrap('<div style="position: relative; min-height: 650px;"></div>');
                }

                var documentElement = $(document);
                var elementParent = $this.parent();

                $(window).bind('scroll', function () {
                    var windowSize = $(window).width();
                    var documentScrolled = documentElement.scrollTop();
                    var startScrolling = elementParent.offset().top;
                    var elementHeight = $this.outerHeight(true);
                    var endScrolling = defaultParams.limit instanceof jQuery ? defaultParams.limit.offset().top - elementHeight - defaultParams.indent : 0;
                    var elementOffset = documentScrolled - (documentScrolled - endScrolling) - startScrolling;

                    if (documentScrolled > startScrolling) {
                        if (endScrolling !== 0 && documentScrolled > endScrolling) {
                            $this.css({
                                position: 'absolute',
                                top: elementOffset
                            });
                        }
                        else {
                            if (windowSize >= 1111) {
                                $this.css({
                                    position: 'fixed',
                                    top: '50px'
                                });
                            }
                            else {
                                $this.css({
                                    top: '50px'
                                });
                            }
                        }
                    }
                    else {
                        $this.css({
                            position: 'absolute',
                            top: 0
                        });
                    }
                }).trigger('scroll');
            });
        };
    })(jQuery);